Like I said previously, "new" ideas aren't always kept. Toei didn't keep the all-male team after SunVulcan, they didn't keep the villain focus after Gekiranger, Kamen Rider hasn't followed Den-O's approach since that show, etc. With Rider, they promoted W as the start of "new" Kamen Rider, and we got a pretty different show that year. What happened? Next year, with OOO, it was business as usual and the ratings went back down. Unless Toei is planning to make a sustained effort to revive the franchise, we can't expect much better for Sentai. Will they do it? Probably not. They don't care about quality, they just want the money.
Not only that, but something being "new" doesn't hold attention by itself. I really hope Kobayashi has sorted out the problems with pacing that we got in Shinkenger and OOO. Otherwise kids will tune in for the start of Gobusters, maybe go back to it when the new heroes appear in June, then interest will tail off as basically nothing important happens for the whole of the second arc